WORM - aka how to write things in stone
WORM stands for Write Once, Read Many - it’s usually used for archival storage systems, and it’s actually sometimes a legal requirement (typically in SOX).
At least three solutions can be commonly found on the market:
- Centera, by EMC, is a WORM solution featuring a retention policy
- Network Appliance (NetApp) has a software solution which runs on their systems called SnapLock
- HP sells WORM Tape Drives
But there is no Open Source filesystem doing this yet AFAIK…